42697771 has 2 divisors, whose sum is σ = 42697772. Its totient is φ = 42697770.

The previous prime is 42697763. The next prime is 42697789. The reversal of 42697771 is 17779624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42697771 - 2³ = 42697763 is a prime.

It is not a weakly prime, because it can be changed into another prime (42691771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21348885 + 21348886.

It is an arithmetic number, because the mean of its divisors is an integer number (21348886).

Almost surely, 2^42697771 is an apocalyptic number.

42697771 is a deficient number, since it is larger than the sum of its proper divisors (1).

42697771 is an equidigital number, since it uses as much as digits as its factorization.

42697771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 43.

The square root of 42697771 is about 6534.3531431963. The cubic root of 42697771 is about 349.5170782000.

The spelling of 42697771 in words is "forty-two million, six hundred ninety-seven thousand, seven hundred seventy-one".